Can Cardinal tetra Live With Rummy-nose tetra?

Detailed assessment

Both Cardinal tetra and Rummy-nose tetra share a comfortable temperature range of 24–28°C (Cardinal tetra prefers 23.9–28.9°C, Rummy-nose tetra prefers 24–28°C). Their pH ranges overlap well at 5.5–6, so water chemistry is compatible. Both species have low aggression scores (Cardinal tetra: 1, Rummy-nose tetra: 1 out of 10), which supports peaceful cohabitation. Overall, these two species can coexist peacefully in a well-maintained community tank with appropriate space.